Silicon Laboratories EFR32xG14 Wireless Gecko Reference Manual page 885

Bit Name
11:8 VINATT
Used to set the VIN attenuation factor.
7:4 VREFATT
Used to set VREF attenuation factor.
3 VREFATTFIX
Enables fixed scaling on VREF
Value
0
1
2:0 VREFSEL
Select reference VREF to ADC single channel mode.
Value
0
1
2
3
4
5
6
7
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Reset Access Description
0x0 RW Code for VIN Attenuation Factor
0x0 RW Code for VREF Attenuation Factor When VREFSEL is 1, 2 or 5
0 RW Enable Fixed Scaling on VREF
Description
VREFATT setting is used to scale VREF when VREFSEL is 1, 2 or 5.
A fixed VREF attenuation is used to cover a large reference source
range. When VREFATT = 0, the scaling factor is 1/4. For non-zero val-
ues of VREFATT, the scaling factor is 1/3.
0x0 RW Single Channel Reference Selection
Mode Description
VBGR Internal 0.83V Bandgap reference
VDDXWATT Scaled AVDD: AVDD*(the VREF attenuation factor)
VREFPWATT Scaled singled ended external Vref: ADCn_EXTP*(the VREF attenua-
tion factor)
VREFP Raw single ended external Vref: ADCn_EXTP
VENTROPY Special mode used to generate ENTROPY.
VREFPNWATT Scaled differential external Vref from : (ADCn_EXTP-
ADCn_EXTN)*(the VREF attenuation factor)
VREFPN Raw differential external Vref from : (ADCn_EXTP-ADCn_EXTN)
VBGRLOW Internal Bandgap reference at low setting 0.78V
Reference Manual
ADC - Analog to Digital Converter
Rev. 1.1 | 885